Big data, showing correlation between a CDC study on cardiovascular disease and a study conducted based on hostility in Twitter tweets. This demonstrates how big data from social media might be used to in new ways to evaluate population health.

Patient engagement plays a key role in the Stage 3 MU rules, where patients are more involved in their health management and treatment decisions. Part of Stage 3 requires electronic patient access to all their medical records, enabled by patient portals, as in this example of Carestream's Vue Motion software.